Technical Briefs

Contributions of Inter- and Intraband Excitations to Electron Heat Capacity and Electron-Phonon Coupling in Noble Metals

[+] Author and Article Information
Patrick E. Hopkins

Engineering Sciences Center, Sandia National Laboratories, P.O. Box 5800, Albuquerque, NM 87185-0346pehopki@sandia.gov

J. Heat Transfer 132(1), 014504 (Nov 04, 2009) (4 pages) doi:10.1115/1.3192133 History: Received January 08, 2009; Revised May 28, 2009; Published November 04, 2009; Online November 04, 2009

This work examines the effects of photonically induced interband excitations from the d-band to states at the Fermi energy on thermophysical properties in noble metals. The change in the electron population in the d-band and the conduction band causes a change in electron heat capacity and electron-phonon coupling factor, which in turn impacts the evolution of the temperature after pulse absorption and electron thermalization. Expressions for heat capacity and electron-phonon coupling factor are derived for electrons undergoing both inter- and intraband transitions. In noble metals, due to the large d-band to Fermi energy separation, the contributions to electron heat capacity and electron-phonon coupling factor of intra- and interband transitions can be separated. At high absorbed laser fluences and pulse energies greater than the interband transition threshold, the interband and intraband contributions to thermophysical properties differ.

Copyright © 2010 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.



Grahic Jump Location
Figure 1

Predictions of (a) electron heat capacity and (b) electron-phonon coupling factor in Au. The numerical calculations are performed using only the s-band density of states (s-band only), the s- and d-band density of states with no photonic excitation (s+d bands), and the s- and d-band density of states with a photonic excitation, hν (hν=1.55 eV, hν=2.4 eV, hν=3.1 eV, and hν=4.65 eV). The s-band density of states calculations show close agreement to low temperature theory throughout the temperature range Te=0–10,000 K.




Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In